Time Domain Space Mapping Optimization of Digital Interconnect Circuits

Microwave circuit design including the design of Interconnect circuits are proving to be a very hard and complex process where the use of CAD tools is becoming more essential to the reduction in design time and in providing more accurate results. Space mapping methods, the relatively new and very efficient way of optimization which are used in microwave filters and structures will be investigated in this thesis and applied to the time domain optimization of digital interconnects. The main advantage is that the optimization is driven using simpler models called coarse models that would approximate the more complex fine model of the real system, which provide a better insight to the problem and at the same time reduce the optimization time. The results are always mapped back to the real system and a relation/mapping is found between both systems which would help the convergence time. In this thesis, we study the optimization of interconnects where we build certain practical error functions to evaluate performance in the time domain. The space mapping method is formulated to avoid problems found in the original formulation where we apply some necessary modifications to the Trust Region Aggressive Space Mapping TRASM for it to be applicable to the design process in time domain. This new method modified TRASM or MTRASM is then evaluated and tested on multiple circuits with different configuration and the results are compared to the results obtained from TRASM.